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psa_constant_names: adding support for signed types

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psa_constant_names now works correctly with signed values, such as
psa_status_t may have.
This commit is contained in:
Gilles Peskine 2019-02-13 18:42:06 +01:00
parent 1b879843d1
commit 3f775264d3
1 changed files with 41 additions and 8 deletions
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49
programs/psa/psa_constant_names.c
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@ -1,3 +1,5 @@
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -151,6 +153,40 @@ static void usage(const char *program_name)
typedef enum {
TYPE_STATUS,
} signed_value_type;
int process_signed(signed_value_type type, long min, long max, char **argp)
{
for (; *argp != NULL; argp++) {
char buffer[200];
char *end;
long value = strtol(*argp, &end, 0);
if (*end) {
printf("Non-numeric value: %s\n", *argp);
return EXIT_FAILURE;
}
if (value < min || (errno == ERANGE && value < 0)) {
printf("Value too small: %s\n", *argp);
return EXIT_FAILURE;
}
if (value > max || (errno == ERANGE && value > 0)) {
printf("Value too large: %s\n", *argp);
return EXIT_FAILURE;
}
switch (type) {
case TYPE_STATUS:
psa_snprint_status(buffer, sizeof(buffer),
(psa_status_t) value);
break;
}
puts(buffer);
}
return EXIT_SUCCESS;
}
typedef enum {
TYPE_ALGORITHM,
TYPE_ECC_CURVE,
TYPE_KEY_TYPE,
@ -167,16 +203,12 @@ int process_unsigned(unsigned_value_type type, unsigned long max, char **argp)
printf("Non-numeric value: %s\n", *argp);
return EXIT_FAILURE;
}
if (value > max) {
if (value > max || errno == ERANGE) {
printf("Value out of range: %s\n", *argp);
return EXIT_FAILURE;
}
switch (type) {
case TYPE_STATUS:
psa_snprint_status(buffer, sizeof(buffer),
(psa_status_t) value);
break;
case TYPE_ALGORITHM:
psa_snprint_algorithm(buffer, sizeof(buffer),
(psa_algorithm_t) value);
@ -211,9 +243,10 @@ int main(int argc, char *argv[])
}
if (!strcmp(argv[1], "error") || !strcmp(argv[1], "status")) {
/* Wrong! psa_status_t is signed. */
return process_unsigned(TYPE_ALGORITHM, 0xffffffff,
argv + 2);
/* There's no way to obtain the actual range of a signed type,
* so hard-code it here: psa_status_t is int32_t. */
return process_signed(TYPE_STATUS, INT32_MIN, INT32_MAX,
argv + 2);
} else if (!strcmp(argv[1], "alg") || !strcmp(argv[1], "algorithm")) {
return process_unsigned(TYPE_ALGORITHM, (psa_algorithm_t) (-1),
argv + 2);